Asked to explain what CNN’s Ashleigh Banfield called a “critical faux pas in this state,” Trump’s rep Katrina Pierson said the GOP presidential front-runner misspoke at a rally in Buffalo on Monday night.

“Well, I think after you’ve done several events over a short time period, people misspeak all the time. Slip of the tongue,” Pierson said.

Trump kept speaking after making the error.

“I wrote this out, and it’s very close to my heart — because I was down there, and I watched our police and our firemen down on 7-Eleven, down at the World Trade Center, right after it came down, and I saw the greatest people I’ve ever seen in action,” Trump said.

Critics mocked the flub on Twitter.

“After 7-Eleven gaffe, I’m waiting for Trump to refer to the worst war of the 20th century as ‘the Big One–WWE,’ ” cracked John Podhoretz, a conservative pundit who writes for The Post.

After 7-Eleven gaffe, I'm waiting for Trump to refer to the worst war of the 20th century as "the Big One–WWE."